A lithium battery diaphragm spray coating production equipment

Abstract

The present invention relates to a lithium battery diaphragm spray coating production equipment, including an upper film device, an unwinding component, a tension adjustment component A, a film feeding traction component, a preheating component, an M-side coating component, an N-side spraying component, a tension adjustment component B, an oven component, a process traction component, a tension adjustment C component, a deviation correction component, a detection component, a tension adjustment D component, a demagnetization component, an electrostatic elimination component, a winding traction component, a winding component, and a lower film device. The upper film device and the lower film device include automatic lifting and automatic advance and retreat devices, and the unwinding component can realize speed linkage control with the M-side coating component and the N-side spraying component. The M-side coating component is coated before the N-side spraying component, and the oven component can dry both sides of the diaphragm at the same time. The present invention has the advantages of convenient operation, good coating effect, high work efficiency, cost saving, etc.

Description

Technical Field

[0001] The invention relates to a lithium battery diaphragm spray coating production equipment. Background Art

[0002] With the development of science and technology, lithium batteries have become the mainstream of power battery development. They have the advantages of high specific energy, wide operating temperature range, and stable discharge. However, there are still various safety hazards in the use process, which restricts their development. Safety is a factor that must be considered for batteries. Among them, the closed-cell temperature and rupture temperature of the diaphragm are important indicators for lithium-ion batteries to ensure safety. Existing lithium batteries are mainly composed of positive electrodes, negative electrodes, electrolytes and diaphragms. The main function of the diaphragm is to separate the positive and negative electrodes to prevent the positive and negative electrodes from directly contacting each other and causing a short circuit, prevent electrons from passing through, and allow ions to pass through; the quality of its performance determines the interface structure and internal resistance of the battery, which in turn affects the capacity, cyclicity, charge and discharge current density and other key characteristics of the lithium battery. Therefore, the quality of the diaphragm performance plays an important role in improving the overall performance of the battery.

[0003] The effect of membrane coating directly affects the performance of the membrane. The existing double-sided coating equipment has low working efficiency, complex structure, high cost, large space occupation, and unsatisfactory spraying effect, which indirectly increases the safety hazards of membrane coating and lithium batteries. According to the current situation, the present invention provides a lithium battery membrane spray coating production equipment with small space occupation, high production efficiency, convenient single-sided and double-sided switching, comprehensive monitoring, and production is conducive to ensuring the quality of membrane products. Summary of the invention

[0004] The purpose of the present invention is to provide a lithium battery diaphragm spray coating production equipment to solve the problems of incomplete monitoring, inconvenient switching and uneven coating in the prior art.

[0005] In order to solve the above technical problems, a lithium battery diaphragm spray coating production equipment is provided, which includes an upper film device, an unwinding component, a tension adjustment component A, a film entry traction component, a preheating component, an M-side coating component, an N-side spraying component, a tension adjustment component B, an oven component, a process traction component, a tension adjustment component C, a deviation correction component, a detection component, a tension adjustment component D, a winding traction component, a winding component, and a lower film device. The upper end of the upper film device is an unwinding component, and the other side of the unwinding component is a tension adjustment component A. The diaphragm is transported to the tension adjustment component A by the unwinding component, and the other side of the tension adjustment component A is a film entry traction component, and the film entry traction component is connected to the preheating component, and one side of the preheating component is an M-side coating component and an N-side spraying component, and the M-side coating component and the N-side spraying component The components are asymmetrically arranged on both sides of the diaphragm, the upper ends of the M-side coating component and the N-side spraying component are oven components, the oven component includes a process traction component and a tension adjustment component C, the output end of the process traction component is the tension adjustment component C, the output end of the tension adjustment component C is the deviation correction component, the other side of the deviation correction component is a detection component, the detection component is connected to the tension adjustment component D, the tension adjustment component D pulls the diaphragm to the winding traction component, the winding traction component is connected to the winding component, the other end of the winding component is provided with a lower film device, the N-side spraying component is provided with a position adjustment device, the distance range between the nozzle of the N-side spraying component and the diaphragm is 0mm-400mm, and the angle range between the nozzle of the N-side spraying component and the diaphragm is 0°-180°.

[0006] The upper film device and the lower film device are respectively provided with an automatic lifting mechanism and an automatic advancing and retreating mechanism.

[0007] The unwinding assembly and the rewinding assembly are respectively provided with upper film and lower film detection sensing devices.

[0008] The unwinding assembly, the M-side coating assembly, the N-side spraying assembly and the oven assembly are provided with a linkage control device.

[0009] The position adjustment device of the N-surface spraying assembly is provided with a device for adjusting and controlling the rotation speed, horizontal position, vertical distance and angle of each turntable.

[0010] The M-side coating assembly and the N-side spraying assembly are respectively provided with a tension detection device and a coating machine head switching device.

[0011] The oven assembly is provided with ovens of various structural types, and the temperature of each oven can be adjusted independently.

[0012] The process traction assembly is provided with a tension detection and adjustment mechanism and a position correction mechanism.

[0013] The detection component is provided with a defect detector, a demagnetization device and a static electricity elimination device.

[0014] The N-side spraying assembly is provided with a material return system, the material return system is provided with a multi-pass filtering and iron removal device, and the pipeline material of the material return system is non-metallic material.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Combining multiple functions, manual operation and intelligent monitoring, to achieve reasonable matching of coating speed, tension at various locations, and oven temperature to ensure uniformity of coating effect.

[0017] 2. Small space occupation, single-layer oven structure, and combination of multiple oven types to meet the drying needs of different sections and ensure the uniformity of the coating layer.

[0018] 3. Single-sided and double-sided coating can be switched easily, and various types of coating methods can be switched stably. It has coating adjustment control devices for each section to meet various coating effect requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the lithium battery separator spray coating production equipment of the present invention;

[0020] The numbers in the figure are: 1-film loading device; 2-unwinding component; 3-tension adjusting component A; 4-film feeding traction component; 5-preheating component; 6-M side coating component; 7-N side spraying component; 8-tension adjusting component B; 9-oven component; 10-process traction component; 11-tension adjusting component C; 12-correction component; 13-detection component; 14-tension adjusting component D; 15-demagnetization component; 16-static elimination component; 17-winding traction component; 18-winding component; 19-film loading device. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the invention more clear, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] like Figure 1The lithium battery diaphragm spray coating production equipment shown in the figure includes a film upper device 1, a reeling assembly 2, a tension adjustment assembly A3, a film inlet traction assembly 4, a preheating assembly 5, an M-side coating assembly 6, an N-side spraying assembly 7, a tension adjustment assembly B8, an oven assembly 9, a process traction assembly 10, a tension adjustment assembly C1, a deviation correction assembly 12, a detection assembly 13, a tension adjustment assembly D14, a reeling traction assembly 17, a reeling assembly 18, and a lower film device 19. The upper end of the film upper device 1 is an unwinding assembly The unwinding assembly 2 is provided with a tension adjusting assembly A3 on the other side, and the diaphragm is transported to the tension adjusting assembly A3 by the unwinding assembly 2. The other side of the tension adjusting assembly A3 is a film-entering traction assembly 4, and the film-entering traction assembly 4 is connected to a preheating assembly 5. One side of the preheating assembly 5 is an M-side coating assembly 6 and an N-side spraying assembly 7, and the M-side coating assembly 6 and the N-side spraying assembly 7 are asymmetrically arranged on both sides of the diaphragm, and the upper ends of the M-side coating assembly 6 and the N-side spraying assembly 7 are drying diaphragms. Box component 9, the oven component 9 includes a process traction component 10 and a tension adjustment component C11, the output end of the process traction component 10 is the tension adjustment component C11, the output end of the tension adjustment component C11 is the correction component 12, the other side of the correction component 12 is the detection component 13, the detection component 13 is connected to the tension adjustment component D14, the tension adjustment component D14 pulls the diaphragm to the winding traction component 17, the winding traction component 17 is connected to the winding component 18, the other end of the winding component 18 is provided with a lower film device 19, the N-side spraying component 7 is provided with a position adjustment device, the distance range between the nozzle of the N-side spraying component 7 and the diaphragm is 0mm-400mm, the angle range between the nozzle of the N-side spraying component 7 and the diaphragm is 0°-180°, and the spray turntable of the N-side spraying component 7 is provided with an adjustment control device, which can adjust the speed, horizontal position, vertical distance and angle of each turntable, and adjust according to the coating effect and thickness of the spraying.

[0023] The upper film device 1 and the lower film device 19 include an automatic lifting mechanism and an automatic advance and retreat mechanism, which automatically position the tube core containing the diaphragm, horizontally transport and rise it to the loading position. After the upper film device 1 detects the tube core, it performs the loading action to complete the loading; when the upper film device 1 needs to change the roll, the lower film detection device is started, the automatic lifting mechanism of the upper film device 1 lifts the empty tube core, and the descending mechanism is started to complete the descent and horizontal retraction of the tube core.

[0024] The unwinding component 2 is provided with a program component for realizing speed linkage control with the M-side coating component 6 and the N-side spraying component 7. When it is detected that the anti-rolling stable speed is consistent with the set coating speed, coating is started to detect the waste of the base film of the slurry. At the same time, the coating effect is guaranteed by adjusting the speed of the three.

[0025] The M-side coating component 6 is provided with a program component which can realize speed linkage control with the N-side spraying component 7. When it is detected that the speed of the M-side coating component 6 is consistent with the coating speed of the N-side spraying component 7, and it is lower than the mechanical set speed of the whole machine, the turntable does not rotate; when it reaches the mechanical set speed of the whole machine, the turntable rotates and coating starts, ensuring simultaneous coating on both sides to avoid missing coating.

[0026] The M-side coating assembly 6 and the N-side spraying assembly 7 are provided with a coating head switching device, and various types of coating methods can be switched stably. Each section of coating adjustment control device is provided to meet various coating effect requirements.

[0027] A tension detection device is provided on one side of each of the M-side coating assembly 6 and the N-side spraying assembly 7 to monitor the stability of the tension and ensure the coating effect.

[0028] The N-side spraying assembly 7 is provided with a material return system, and the material return system is provided with a multi-pass filtering and iron removal device, and the pipe material of the material return system is non-metallic material.

[0029] The oven assembly 9 is provided with a linkage control program assembly for adjusting the temperature according to the vehicle speed. The production speed is different, the temperature is different, and real-time adjustment is performed to ensure the coating drying effect, while saving resources and reducing costs.

[0030] The oven assembly 9 is provided with oven devices of various structural types, which can dry both sides of the diaphragm at the same time. Different drying sections have different temperatures, and the drying effects and degrees are different.

[0031] The process traction assembly 10 includes tension detection, tension adjustment and position correction devices, which ensure stable tension and uniform drying during drying, improve production efficiency and provide guarantee for the winding effect.

[0032] After drying, the diaphragm enters the tension adjustment C component 11 for tension adjustment, and the center position of the winding width is stabilized by the correction component 12. The diaphragm is defect-detected at the detection component 13, and the diaphragm adsorbs magnetic substances in the demagnetization component 15. The diaphragm eliminates static electricity in the static elimination component 16. The diaphragm is prepared for winding through the winding traction component 17. When winding, the winding component 18 adjusts the production speed to be consistent with the winding speed to ensure the winding quality. After winding, the diaphragm is transported to the film storage rack through the film lowering device 19.

[0033] The above is an explanation of a lithium battery diaphragm spray coating production equipment of the present invention to help understand the present invention, but the implementation mode of the present invention is not limited to the above-mentioned embodiments. Any changes, modifications, substitutions, combinations, and simplifications made without departing from the principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A lithium battery separator spray coating production equipment, comprising a film loading device (1), an unwinding component (2), a tension adjustment component A (3), a film feeding traction component (4), a preheating component (5), an M-side coating component (6), an N-side spraying component (7), a tension adjustment component B (8), an oven component (9), a process traction component (10), a tension adjustment component C (11), a deviation correction component (12), a detection component (13), a tension adjustment component D (14), a winding traction component (17), and a winding component (18). The lower film device (19) comprises an unwinding assembly (2) at the upper end of the upper film device (1), the other side of the unwinding assembly (2) being a tension adjustment assembly A (3), the diaphragm being transported from the unwinding assembly (2) to the tension adjustment assembly A (3), the other side of the tension adjustment assembly A (3) being a film entry traction assembly (4), the film entry traction assembly (4) being connected to a preheating assembly (5), one side of the preheating assembly (5) being an M-side coating assembly (6) and an N-side spraying assembly (7), the M-side coating assembly (6) and the N-side The spraying assembly (7) is asymmetrically arranged on both sides of the diaphragm. The upper ends of the M-side coating assembly (6) and the N-side spraying assembly (7) are oven assemblies (9). The oven assemblies (9) include a process traction assembly (10) and a tension adjustment assembly C (11). The output end of the process traction assembly (10) is the tension adjustment assembly C (11). The output end of the tension adjustment assembly C (11) is a deviation correction assembly (12). The other side of the deviation correction assembly (12) is a detection assembly (13). The detection assembly (13) and the tension adjustment assembly C (11) are connected to each other. The tension adjustment component D (14) is connected to the node component D (14), the tension adjustment component D (14) pulls the diaphragm to the winding traction component (17), the winding traction component (17) is connected to the winding component (18), the other end of the winding component (18) is provided with a lower film device (19), the N-side spraying component (7) is provided with a position adjustment device, the distance between the nozzle of the N-side spraying component (7) and the diaphragm ranges from 0 mm to 400 mm, and the angle between the nozzle of the N-side spraying component (7) and the diaphragm ranges from 0° to 180°; The position adjustment device of the N-surface spraying assembly (7) is provided with a device for adjusting and controlling the rotation speed, horizontal position, vertical distance and angle of each turntable; The M-side coating assembly (6) and the N-side spraying assembly (7) are respectively provided with a tension detection device and a coating machine head switching device; The oven assembly (9) is provided with ovens of various structural types, and the temperature of each oven can be adjusted independently.

2. A lithium battery separator spray coating production equipment according to claim 1, characterized in that: The upper film device (1) and the lower film device (19) are respectively provided with an automatic lifting mechanism and an automatic advancing and retreating mechanism.

3. A lithium battery separator spray coating production equipment according to claim 1, characterized in that: The unwinding component (2) and the rewinding component (18) are respectively provided with upper film and lower film detection sensing devices.

4. A lithium battery separator spray coating production equipment according to claim 1, characterized in that: The unwinding assembly (2), the M-side coating assembly (6), the N-side spraying assembly (7) and the oven assembly (9) are provided with a linkage control device.

5. The lithium battery separator spray coating production equipment according to claim 1, characterized in that: The process traction component (10) is provided with a tension detection and adjustment mechanism and a position deviation correction mechanism.

6. The lithium battery separator spray coating production equipment according to claim 1, characterized in that: The detection component (13) is provided with a defect detector, a demagnetization device (15) and a static electricity elimination device (16).

7. The lithium battery separator spray coating production equipment according to claim 1, characterized in that: The N-side spraying assembly (7) is provided with a material return system, the material return system is provided with a multi-pass filtering and iron removal device, and the pipe material of the material return system is a non-metallic material.

Images